The Silvies River flooded portions of Burns and surrounding areas from the 16th to the 24th of the month due to widespread rainfall and snowmelt.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOI wrote it up.
The Silvies River flooded portions of Burns and surrounding areas from the 16th to the 24th of the month due to widespread rainfall and snowmelt.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boise, ID wrote its last area forecast discussion before the first event at May 16, 8:02 AM PST, 2 hours 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE ID 1002 AM MDT MON MAY 16 2011 .DISCUSSION...AREA OF RAIN...WITH A LITTLE SNOW MIXED IN... CONTINUES OVER MUCH OF THE TREASURE VALLEY AND THE MOUNTAINS OF SW IDAHO AND SE OREGON. THE AREA IS DECREASING IN SIZE AND INTENSITY AND THIS TREND IS EXPECTED TO CONTINUE. WE WILL SEE ISOLATED TO SCATTERED SHOWERS THIS AFTERNOON OVER THE REGION AS WE REMAIN UNDER THE COLD UPPER LEVEL LOW. NO CHANGES TO THE FORECAST AT THIS TIME. PLEASE SEE THE HYDROLOGY SECTION BELOW FOR UPDATES TO THE CURRENT FLOODING. && .AVIATION...SCATTERED RAIN AND SNOW SHOWERS WILL BRING AREAS OF MVFR AND LOCAL IFR CONDITIONS THROUGH 18Z. SNOW LEVELS APPROXIMATELY 4000 FT MSL. MOUNTAINS WILL BE OBSCURED. AFTER 18Z...SHOWERS TO DECREASE IN COVERAGE WITH CIGS GENERALLY MVFR OR HIGHER. SLIGHT THREAT OF TSTMS 20Z-03Z THIS EVENING EVENING - NEAR AND NORTH OF KBOI. LIGHT SURFACE WINDS. LIGHT SOUTHWESTERLY WINDS ALOFT. && .HYDROLOGY...FLOODING CONTINUES ON THE BRUNEAU AND POWDER RIVERS. THERE IS AN AREAL FLOOD WARNING FOR BAKER COUNTY FOR FLOODING ON MULTIPLE CREEKS AND STREAMS TO GO ALONG WITH THE FLOODING ON THE POWDER. COLDER TEMPERATURES MEANS THAT LOWER SNOW LEVELS WILL REDUCE SNOWMELT...ALTHOUGH ADDITIONAL LOWER ELEVATION RAINFALL WILL CONTINUE TO RAISE MANY RIVER AND STREAM LEVELS THROUGHOUT THE AREA. AS THE RAINFALL DECREASES LATER TODAY AND ESPECIALLY TONIGHT...MANY OF THE SMALLER CREEKS AND STREAMS WILL SEE DECREASING WATER LEVELS. THE LATEST RIVER INFORMATION CAN BE VIEWED ON OUR WEB PAGE AT WWW.WEATHER.GOV/BOISE BY CLICKING ON THE RIVER AND LAKE AHPS LINK. && .PREV DISCUSSION... SHORT TERM...TODAY THROUGH TUESDAY...SEVERAL RIVERS AND STREAMS THROUGHOUT THE REGION ARE RUNNING HIGH...SEE HYDRO SECTION BELOW. UPPER LEVEL TROUGH...WITH SEVERAL SHORT WAVES EMBEDDED WITHIN...ENCOMPASSES THE PACIFIC NORTHWEST THIS MORNING. ONE OF THOSE SHORT WAVES...CENTERED OVER OUR AREA...WAS ROTATING SLOWLY NORTHWARD AND WILL BE NORTH OF THE AREA BY MIDDAY. RAIN...WITH SNOW ABOVE 3500 FEET...CONTINUES IN ASSOCIATION WITH THE WAVE. BULK OF THE STEADIER PRECIPITATION WAS OCCURRING GENERALLY NORTH OF A ROME-BOISE-STANLEY LINE. THERE WILL BE SOMEWHAT OF A LULL IN SHOWER ACTIVITY LATER TODAY AND TONIGHT BEFORE A SECOND SHORT WAVE PIVOTS NORTHWARD INTO THE AREA ON TUESDAY. EXPECTING ANY ADDITIONAL PRECIP AMOUNTS AFTER THIS MORNING WILL BE LIGHT. THE NEXT COUPLE AFTERNOONS WILL BE UNSTABLE ENOUGH TO SUPPORT ISOLATED THUNDERSTORMS DUE TO THE COLDER AIR ALOFT. TEMPERATURES WILL REMAIN UNSEASONABLY COOL WITH HIGHS 10-15 DEGREES BELOW NORMAL. LONG TERM...TUESDAY NIGHT THROUGH SUNDAY...MODELS REMAIN IN GOOD AGREEMENT WITH A SLOW MOVING UPPER LEVEL TROUGH THROUGH THE PERIOD. THE UPPER LEVEL LOW IS OVER THE PACIFIC NORTHWEST ON WEDNESDAY FOR CONTINUED BELOW NORMAL TEMPERATURES AND CHANCE TO LIKELY PRECIPITATION. THURSDAY AND FRIDAY THE UPPER LEVEL TROUGH WILL SHIFT ENOUGH TO THE EAST FOR DRY CONDITIONS OVER AT LEAST SOUTHEAST OREGON. ENOUGH WRAP AROUND MOISTURE IN THE DEPARTING UPPER LEVEL TROUGH TO KEEP SLIGHT CHANCE POPS OVER THE HIGHER TERRAIN OF SOUTHWEST IDAHO. TEMPERATURES WILL BEGIN TO WARM BACK TO NEAR NORMAL. FOR THE WEEKEND ANOTHER UPPER LEVEL TROUGH WILL MOVE INTO THE WEST COAST. SOME UNCERTAINTY AS TO WHERE THE LOW WILL TRACK WITH THIS SYSTEM BUT ENOUGH CONFIDENCE TO KEEP POPS AT OR SLIGHTLY ABOVE CLIMATOLOGY AND TEMPERATURES NEAR NORMAL. && .BOI WATCHES/WARNINGS/ADVISORIES... ID...NONE. OR...NONE. && WEATHER.GOV/BOISE DISCUSSION...SP AVIATION.....MT PREV SHORT TERM...BW PREV LONG TERM....JA
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BOISE ID 556 AM MDT MON MAY 16 2011 IDZ014-ORZ062-171200- UPPER TREASURE VALLEY-BAKER COUNTY- 556 AM MDT MON MAY 16 2011 /456 AM PDT MON MAY 16 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IDAHO AND NORTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT MINOR FLOODING WILL CONTINUE ALONG PORTIONS OF THE POWDER RIVER IN BAKER CITY OREGON AND PORTIONS OF THE BRUNEAU RIVER NEAR HOT SPRINGS IN IDAHO. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY UNSETTLED WEATHER WILL CONTINUE THROUGH THE END OF THE WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ASKED TO REPORT ANY SIGNIFICANT WEATHER THROUGH ESTABLISHED PROCEDURES. IDZ011>013-015-016-028>030-033-ORZ061-063-064-171200- WEST CENTRAL MOUNTAINS-LOWER TREASURE VALLEY ID-BOISE MOUNTAINS- SOUTHWEST HIGHLANDS-WESTERN MAGIC VALLEY-CAMAS PRAIRIE- OWYHEE MOUNTAINS-SOUTHERN TWIN FALLS COUNTY-UPPER WEISER RIVER- HARNEY COUNTY-MALHEUR COUNTY-LOWER TREASURE VALLEY OR- 556 AM MDT MON MAY 16 2011 /456 AM PDT MON MAY 16 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL IDAHO...SOUTHWEST IDAHO...WEST CENTRAL IDAHO AND SOUTHEAST OREGON. .DAY ONE...TODAY AND TONIGHT COOL TEMPERATURES WITH RAIN SHOWERS WITH SNOW SHOWERS ABOVE 3500 FEET. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY UNSETTLED WEATHER WILL CONTINUE THROUGH THE END OF THE WEEK. .SPOTTER INFORMATION STATEMENT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Harney County Emergency Manager reported widespread flooding along the Silvies River in and around Burns and along U.S. Highway 20.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2011Every state in 2011This day in weather historyWarnings in Oregon, May 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 320324.